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Category: life extension – Page 444

An Interview with Dr. María Blasco

Our Ending Age-Related Diseases conference in New York is over for this year and has been a huge success. We had the opportunity to interview one of the speakers, Dr. Mar í a Blasco, during the conference, and we asked her more about her work with telomeres, telomerase therapy, and aging.

Telomere loss is a proposed reason we age

Telomere attrition—the wearing out of your chromosomes’ protective caps with age—is widely thought to be one of the major drivers of aging. With each division, telomeres shorten a little bit, and after 50–70 divisions, they become critically short. Once this threshold (the Hayflick limit) is hit, cells undergo replicative senescence, and their division comes to a grinding halt.

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Is Immortality Worth It?

Any major breakthrough in extending human life would drastically alter population projections. The social effects, while obviously huge, would depend on whether the years of senility were prolonged, too; whether women’s age at menopause would increase; and how families would be structured if many generations were alive at the same time. Expensive treatments to extend human lives could also have implications for inequality; as in many other areas of technology, the wealthy would be most able to afford such services.

Almost everyone would welcome an extension of their healthy lifespan, and some scientists are looking at increasingly extreme ways to achieve that. But any major breakthrough in this area could have unwanted and far-reaching demographic, social, and economic implications.

CAMBRIDGE – Humans have long sought the elixir of youth, so it is not surprising that even non-scientists closely follow the latest research into aging. But is what most people consider simply a fact of life actually a “disease” that can be cured? Or is there some insurmountable limit to the lifespan of human bodies?

Dr. Michael Fossel: Compassion is the reason to reverse aging!

An excellent interview. Fossel and Aubrey de Grey of the SENS Foundation are in disagreement about telomerase.

https://www.singularityweblog.com/michael-fossel/ ‎

Michael Fossel‘s dream is to reverse human aging and since 1996 he has been a strong and vocal advocate of experimenting with telomerase therapy as a potential way of intervention in a wide variety of medical conditions related to aging. In addition, Fossel is one of those unique people who are a real pleasure to not only see speaking from the stage but also to meet in person. And having done both of these, I can honestly say that Michael is as much an impassioned expert speaker as he is a compassionate human being. Not only that but he is also a generous host, who loves entertaining guests visiting his fabulous house near Rapid Falls, Michigan and I have to admit I had tons of fun socializing with him both in front and behind camera. So, all in all, it was a lot of fun meeting and interviewing Dr. Fossel for my Singularity 1 on 1 podcast.

During our 1 hour discussion with Michael we cover a variety of interesting topics such as: his dream to reverse aging and the desirability and feasibility thereof; the Hayflick limit of cell division and Aubrey de Grey’s concerns that telomerase therapy may cause cancer; the distinction between reversing aging and living forever; his “non-sexy” tips on healthy living; his take on cryonics and transhumanism…

My favorite quotes that I will take away from this interview with Michael Fossel are:

Continue reading “Dr. Michael Fossel: Compassion is the reason to reverse aging!” | >

Telomere shortening rate predicts species life span

The exact causes of aging are still not understood, and it is unclear why some species live less than 1 d, while others can live more than 400 y. Research suggests that telomeres are related to the aging process, but a clear relationship between the life span of a species and initial telomere length has not been observed. Here, we measure the telomere lengths of a variety of different species. We find that, in fact, there is no strong correlation between the life span of a species and initial telomere length. However, we find a strong correlation between the telomere shortening rate and the life span of a species.

Telomere shortening to a critical length can trigger aging and shorter life spans in mice and humans by a mechanism that involves induction of a persistent DNA damage response at chromosome ends and loss of cellular viability. However, whether telomere length is a universal determinant of species longevity is not known. To determine whether telomere shortening can be a single parameter to predict species longevities, here we measured in parallel the telomere length of a wide variety of species (birds and mammals) with very different life spans and body sizes, including mouse (Mus musculus), goat (Capra hircus), Audouin’s gull (Larus audouinii), reindeer (Rangifer tarandus), griffon vulture (Gyps fulvus), bottlenose dolphin (Tursiops truncatus), American flamingo (Phoenicopterus ruber), and Sumatran elephant (Elephas maximus sumatranus). We found that the telomere shortening rate, but not the initial telomere length alone, is a powerful predictor of species life span.